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Articles 3691 - 3720 of 4557
Full-Text Articles in Ornithology
Behavior Of The Australian Musk Duck And Blue-Billed Duck, Paul A. Johnsgard
Behavior Of The Australian Musk Duck And Blue-Billed Duck, Paul A. Johnsgard
Papers in Ornithology
Sexual displays of the Musk Duck and Blue-billed Duck are described and illustrated. The displays of male Musk Ducks comprise a series of three forms exhibiting increasing ritualization, complexity, and time-interval constancy. All of them have conspicuous auditory characteristics as well as variously conspicuous visual features. Displays in the species appear to have evolved under the influence of intense sexual selection resulting from what is probably a more completely promiscuous mating system than occurs in any other species of Anatidae. These selective pressures have also probably promoted the evolution of such features as large size and extreme sexual dimorphism that …
Inheritance Of Behavioral Characters In F2 Mallard X Pintail (Anas Platyrhynchos L. X Anas Acutas L.) Hybrids, Roger S. Sharpe, Paul A. Johnsgard
Inheritance Of Behavioral Characters In F2 Mallard X Pintail (Anas Platyrhynchos L. X Anas Acutas L.) Hybrids, Roger S. Sharpe, Paul A. Johnsgard
Paul Johnsgard Collection
The present study was undertaken to compare the inheritance of behavioral and morphological features of two closely related species of Anas, and to attempt to establish whether any significant degree of behavioral variation occurs in the second generation which could be attributed to these genetic processes.
Two closely related species of Anas, the Common Mallard (A. p. platyrhynchos) and the Common Pintail (A. a. acuta), were selected for study. Both species have been repeatedly hybridized in captivity (GRAY, 1958; PHILLIPS, 1915, 1921), and occasionally hybrids occur in the wild. MAYR (1963) has commented on the …
Symposium O Koroptvi / Symposium On Partridge: Výzkumný Űstav Lesniho Hospodářství A Myslivosti Československý Myslivecký Svaz, Czechoslovak Forestry And Game Management Research Institute, Czechoslovak Hunting Union
Symposium O Koroptvi / Symposium On Partridge: Výzkumný Űstav Lesniho Hospodářství A Myslivosti Československý Myslivecký Svaz, Czechoslovak Forestry And Game Management Research Institute, Czechoslovak Hunting Union
Galliformes Specialist Group and Affiliated Societies: Conference Proceedings
English abstract
The Symposium on Partridge was organized by the Forestry and Czechoslovak Game Management Research Institute and the Czechoslovak Hunting Union and held in Prague, Czechoslovakia in October 1965. Participants in the symposium were specialists and scientific workers from Czechoslovakia and some scientists from abroad. There were two major themes: 1. the present state of partridge research and 2. conservation issues, including the problems and prospects of partridge stocks.
Papers concerned biology of partridges, ecology, population dynamics, migration, nestng, food, influence of predators, health, helminths, gapes, hemogram, rearing of partridges, rearing of chicks, penning, wintering in pens, protection during …
'65 Saw Feathered Chums Nested, Protected, Inspected, Jessie Maye Smith
'65 Saw Feathered Chums Nested, Protected, Inspected, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Annual Audubon Bird Count Under Way In U.S., Canada, Jessie Maye Smith
Annual Audubon Bird Count Under Way In U.S., Canada, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Birds Will Feast On Own Yule Tree, Jessie Maye Smith
Birds Will Feast On Own Yule Tree, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Charm Of Goldfinch Lies In Song, Plume, Jessie Maye Smith
Charm Of Goldfinch Lies In Song, Plume, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Harris' Sparrow Handsome Bird Takes Winter Leave In Texas, Jessie Maye Smith
Harris' Sparrow Handsome Bird Takes Winter Leave In Texas, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Inn Provides Rare Treat In Watching, Jessie Maye Smith
Inn Provides Rare Treat In Watching, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Whooping Cranes May Reach 50 By End Of The Year, Jessie Maye Smith
Whooping Cranes May Reach 50 By End Of The Year, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Kentucky Warbler (Vol. 41, No. 4), Kentucky Library Research Collections
Kentucky Warbler (Vol. 41, No. 4), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
160 Ornithological Society Members Achieve Club Goal, Jessie Maye Smith
160 Ornithological Society Members Achieve Club Goal, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Migrant Hummers Big Patrons Of Syrup-Filled Feeder Bottles, Jessie Maye Smith
Migrant Hummers Big Patrons Of Syrup-Filled Feeder Bottles, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Protection Of Nature Discussed, Jessie Maye Smith
Protection Of Nature Discussed, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Shortage Of Ducks Critical, Jessie Maye Smith
Shortage Of Ducks Critical, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
The Elusive Musk Ducks, Paul A. Johnsgard
The Elusive Musk Ducks, Paul A. Johnsgard
Papers in Ornithology
If one were to try to choose the most remarkable duck in the world, serious consideration would have to be given the Australian Musk Duck (Biziura lobata) of the family Anatidae. Among its unusual features are the great dimorphism of the sexes (males weigh eight pounds or more and are about three feet from bill to tail; females weigh two to three pounds and measure about two feet), the leathery pendent lobe that is located on the lower mandible, the strong odor of musk that is prominent in males during the breeding season, and the remarkably large eggs (averaging one-half …
Chimney Swifts Migration Common Sight, Jessie Maye Smith
Chimney Swifts Migration Common Sight, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Regardless Of Route, Bird-Watching Enhances Trip, Jessie Maye Smith
Regardless Of Route, Bird-Watching Enhances Trip, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Fall Warbler Watch On In Fort Worth, Jessie Maye Smith
Fall Warbler Watch On In Fort Worth, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Parade Of Ducks Is Hotel Tradition, Jessie Maye Smith
Parade Of Ducks Is Hotel Tradition, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Children Discover Excirtement In Birds Of Alabama Creekbed (Chipping Sparrrow,, Jessie Maye Smith
Children Discover Excirtement In Birds Of Alabama Creekbed (Chipping Sparrrow,, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Black-Necked Stilt Spotted Near Lake, Jessie Maye Smith
Black-Necked Stilt Spotted Near Lake, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Blue-Winged Teal Signal Start Of Waterfowl Migration, Jessie Maye Smith
Blue-Winged Teal Signal Start Of Waterfowl Migration, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Fort Worth Zoo Has Rare Birds, Jessie Maye Smith
Fort Worth Zoo Has Rare Birds, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
The Breeding Population Of Waterfowl On The Chippewa National Forest, John Mathiesen
The Breeding Population Of Waterfowl On The Chippewa National Forest, John Mathiesen
United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications
The purpose of this paper is to describe the characteristics of the breeding waterfowl population on the Chippewa National Forest in north central Minnesota.
Kentucky Warbler (Vol. 41, No. 3), Kentucky Library Research Collections
Kentucky Warbler (Vol. 41, No. 3), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Gulf Coast Bird Life Virtual Watchers' Mecca, Jessie Maye Smith
Gulf Coast Bird Life Virtual Watchers' Mecca, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Help Required Kirtland Warbler Sighted In Lower Michigan Area, Jessie Maye Smith
Help Required Kirtland Warbler Sighted In Lower Michigan Area, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Boat-Tailed Grackle Finds Area Fitting, Settles Down, Jessie Maye Smith
Boat-Tailed Grackle Finds Area Fitting, Settles Down, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.
Even Bird World Spotlights Youth, Jessie Maye Smith
Even Bird World Spotlights Youth, Jessie Maye Smith
Jessie Maye Smith Birds and Watchers Columns Collection
No abstract provided.